Signal module



FIG. 1 is a perspective view of a signal module.

FIG. 2 is a front view of the signal module illustrated in FIG. 1.

FIG. 3 is a rear view of the signal module shown in FIG. 1.

FIG. 4 is a left side view of the signal module illustrated in FIG. 1.

FIG. 5 is a right side view of the signal module shown in FIG. 1.

FIG. 6 is a a top view of the signal module shown in FIG. 1; and,

FIG. 7 is a bottom view of the signal module shown in FIG. 1.

The signal module is shown broken away in FIGS. 1 and 4-7 of the drawing to indicate in determinant length, it being understood that it has a uniform shape and appearance through out its length.

The features indicated in the figures in broken lines form no part of the claimed design. 

The ornamental design for a signal module, as shown and described. 